Former NAS Moffett Field




Hangar 1 Removal Action Update


          Mike Schulz, PMP

   AMEC Earth & Environmental, I...
Presentation Overview




• Project Objective and Approach
• Progress to Date
      Community Outreach    Work Plans
   ...
Project Objective




• Control release of PCBs from Hangar 1 in accordance
  with EE/CA (July 2008) and Action Memorandum...
Project Approach




• Use of interior scaffold system to promote safety and
  contaminant control
• Use of the hangar she...
Community Outreach Update


•   RAB presentation November 2009
•   Fact Sheet January 2010
•   NASA briefing January 2010
...
RAB Tour of Cork Room




                        6
Work Plan Status




• Accident Prevention Plan
  (February 2010)
• Final Sampling and
  Analysis Plan (April 2010)
• Fina...
Biological Survey


• Biological surveys conducted January – April 2010
• Final Biological Survey Report submitted May 201...
Biological Survey Recommendations


• Recommendations approved by California
  Department of Fish & Game and US Fish & Wil...
Burrowing Owl Locations




Construction fence approximately 175 Feet north of active burrow
                             ...
Coating Condition Survey


• Evaluated condition of existing coating on steel frame in
  accordance with Society of Protec...
Coating Condition Survey Results



• Adhesion of existing coating very good at all locations tested
   – Average adhesion...
Pre-Construction Sampling


• Soil Areas
   – 110 samples collected from soil areas
   – 20 samples >1,000 μg/kg PCB actio...
Baseline Sampling Results




                            14
Asbestos Survey



• Inspection of all building materials completed in May 2010
• Over 300 samples collected
• Asbestos-Co...
Examples of Asbestos Materials




     Drywall             Mastic under flooring




Duct tape and wrap        Light fixt...
Asbestos Abatement Controls



•   Compliance with OHSA and
    Cal. Code of Regulations
    (CCR Title 8)
•   Install con...
Air Monitoring Plan - Interior




                                 18
Air Monitoring Plan - Exterior




                                 19
Mobilization



•   Temporary construction fence
•   Owl buffer zone
•   Utility termination
•   Decontamination areas
•  ...
Site Plan




            21
Preservation of Historic Artifacts




                                     22
Future Activities



•   Continue biological monitoring
•   Complete decontamination of salvaged items
•   Asbestos abatem...
Interior Demolition




•   Combination of manual and machine demolition methods
•   Designed to protect structural integr...
Siding Removal Plan


•   Phase work in 6 Zones    •   Work from roof to ground
•   Start on the south end   •   Coordinat...
Schedule



• Start asbestos abatement anticipated
      July 2010
• Start interior demolition anticipated
      October 2...
Questions




       Point of Contact

    Kathryn Stewart, P.E.
BRAC Environmental Coordinator
       (619) 532-0796
  Ka...
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Hangar One Update 2010/07/08, Moffett Restoration Advisory Board

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Presentation by Mike Schulz of AMEC Earth and Environmental (Navy contractor) on the Hangar One Removal Action.

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Hangar One Update 2010/07/08, Moffett Restoration Advisory Board

  1. 1. Former NAS Moffett Field Hangar 1 Removal Action Update Mike Schulz, PMP AMEC Earth & Environmental, Inc. July 8, 2010 RAB Meeting 1
  2. 2. Presentation Overview • Project Objective and Approach • Progress to Date  Community Outreach  Work Plans  Biological Survey  Coating Condition Survey  Asbestos Survey  Pre-construction  Mobilization Sampling • Future Activities • Schedule • Questions 2
  3. 3. Project Objective • Control release of PCBs from Hangar 1 in accordance with EE/CA (July 2008) and Action Memorandum (December 2008)  Demolition of interior structures  Removal of contaminated siding  Application of weather-resistant coating to steel frame 3
  4. 4. Project Approach • Use of interior scaffold system to promote safety and contaminant control • Use of the hangar shell as containment during interior demolition and coating • Epoxy coating system with proven performance • Rigorous air monitoring program 4
  5. 5. Community Outreach Update • RAB presentation November 2009 • Fact Sheet January 2010 • NASA briefing January 2010 • Video documentation • RAB tour July 2010 5
  6. 6. RAB Tour of Cork Room 6
  7. 7. Work Plan Status • Accident Prevention Plan (February 2010) • Final Sampling and Analysis Plan (April 2010) • Final Work Plan (June 2010) • Biological Hazard Abatement Plan 7
  8. 8. Biological Survey • Biological surveys conducted January – April 2010 • Final Biological Survey Report submitted May 2010 • Species observed:  White-throated Swift  Common Raven  Barn Owl  Cliff Swallow  House Finch  Burrowing Owl  Coyote, Gray Fox, Red Fox  Black-tailed Jack Rabbit Inactive Cliff Swallow nest  California Ground Squirrel 8
  9. 9. Biological Survey Recommendations • Recommendations approved by California Department of Fish & Game and US Fish & Wildlife Service  Remove inactive nests  Protect active Raven nest  Periodic nesting surveys  Monitor and protect Burrowing Owls Inspection of clamshell doors for Swift nests 9
  10. 10. Burrowing Owl Locations Construction fence approximately 175 Feet north of active burrow 10
  11. 11. Coating Condition Survey • Evaluated condition of existing coating on steel frame in accordance with Society of Protective Coatings TU-3:  Rust  Corrosion  Peeling/Blistering  Cracking/Checking  Chalking  Film Thickness  Adhesion • Evaluated performance of new coating system adhesion  Patch tests Patch test on new coating 11
  12. 12. Coating Condition Survey Results • Adhesion of existing coating very good at all locations tested – Average adhesion strength of 603 psi – 200 psi is acceptable • Recommended coating system: – Carbomastic 15 (CM15) aluminum epoxy mastic – Surface preparation by low-pressure water cleaning and localized abrasive blasting or power tool cleaning – Application by spray, brush, or roller at 3 – 10 mils • Excellent adhesion of CM15 coating system demonstrated in all tests (550 psi – 675 psi) 12
  13. 13. Pre-Construction Sampling • Soil Areas – 110 samples collected from soil areas – 20 samples >1,000 μg/kg PCB action limit – PCB contamination restricted to upper 6 inches – Contaminated soil will be excavated and disposed off site • Storm Drain Trench Sediment – 4 samples collected from the storm drain – All samples exceed PCB action limit – Sediment will be removed by vacuum methods and disposed off site 13
  14. 14. Baseline Sampling Results 14
  15. 15. Asbestos Survey • Inspection of all building materials completed in May 2010 • Over 300 samples collected • Asbestos-Containing Materials include:  Floor tile  Pipe insulation  Drywall and plaster on walls  Roofing on interior buildings  Mastics under flooring  Fire doors, file cabinets and safes  Window sealants and caulk  Gaskets on electrical fixtures  Sealant between siding and steel frame 15
  16. 16. Examples of Asbestos Materials Drywall Mastic under flooring Duct tape and wrap Light fixture gaskets 16
  17. 17. Asbestos Abatement Controls • Compliance with OHSA and Cal. Code of Regulations (CCR Title 8) • Install containment barriers and negative air pressure • Air monitoring supervised by Certified Industrial Hygienist • Post abatement inspection and clearance sampling • All work under direction of California Asbestos Consultant 17
  18. 18. Air Monitoring Plan - Interior 18
  19. 19. Air Monitoring Plan - Exterior 19
  20. 20. Mobilization • Temporary construction fence • Owl buffer zone • Utility termination • Decontamination areas • Lay down areas • Storm water controls • Air monitoring stations • Command post • Worker orientation • Ellis Gate open 20
  21. 21. Site Plan 21
  22. 22. Preservation of Historic Artifacts 22
  23. 23. Future Activities • Continue biological monitoring • Complete decontamination of salvaged items • Asbestos abatement • Demolition of interior structures • Repair of secondary structural steel members • Scaffold installation • Siding removal and coating • Community outreach meetings • Fact sheets 23
  24. 24. Interior Demolition • Combination of manual and machine demolition methods • Designed to protect structural integrity of the hangar 24
  25. 25. Siding Removal Plan • Phase work in 6 Zones • Work from roof to ground • Start on the south end • Coordinated with coating 25
  26. 26. Schedule • Start asbestos abatement anticipated July 2010 • Start interior demolition anticipated October 2010 • Start siding removal Spring 2011 • Complete siding removal and coating Winter 2011 • Submit final report Spring 2012 26
  27. 27. Questions Point of Contact Kathryn Stewart, P.E. BRAC Environmental Coordinator (619) 532-0796 Kathryn.Stewart@navy.mil 27

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